We present H α line imaging observations of 122 galaxies obtained with the 1.20 m telescopes of the Observatoire de Haute Provence (OHP) and of Calar Alto. The observed galaxies are mostly Virgo cluster members (95), along with 10 objects in the Coma/A1367 supercluster, 6 in the clusters A2197 and A2199, and 11 nearby galaxies taken as fillers. H α+[NII] fluxes and equivalent widths, as well as images of all the detected targets, are presented.